Island



(No Model.)

J. SULLIVAN. Bush Hammer.

No. 241,166. Patented May 10,1881

Nrreio STATES PATENT OFFICE.

JOHN B. SULLIVAN, OF WESTERLXQ RHODE ISLAND.

BUSH-HAMM ER.

SPECIFICATION forming part of Letters Patent No. 241,166, dated May 10, 1881,

Application filed September 10, 1880. (No model.)

To all whom it may concern:

Be it known that I, JOHN B. SULLIVAN, of Westerly, in the county of Washington and State of Rhode Island, have invented a new and useful Improvement in Bush-Hammers;

- and I hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompan yin g drawin gs, forming part of this specification.

This invention has reference to an improvement in the stock or gib of a bush-hammer; and it consists in the peculiar and novel manner in which the bits are secured so as to rest firmly and squarely on the stock the whole of their width, as will be more fully setforth hereinafter.

Figure lis a perspective view of my improved bush-hammer; and Fig. 2 is a perspective view of the various parts, shown one above the other in succession as they are arranged to fit together.

This invention is an improvement on Patent No. 201,850, granted to me March 26, 1878, for an improvement in bush-hammers.

The object of the invention is to simplify the construction of the stock or gib.

1n the drawings, a is the stock or gib proper provided with the hole I), in which the handle is secured. The stock is provided with the square shoulders c c, on which the hits at (1 rest firmly the whole of their width, so as to resist the shock when they are struck with force on the stone. The stock a is also provided with the projecting sides 0 e, in which the boltsff are secured. The groove 9 is made into the stock a to receive the narrow portion g of the removable side plate, h, which at each end has the wider plates 6 0, provided with the holes through which the bolts f f pass. The plate h rests when secured firmly against the square shoulders c c. The bits d are provided with the holes at, which are made slightly larger than the diameter of the bolts, so that they can be readily inserted and rest firmly on the shoulders c 0, and not against the bolts.

The bits can be removed, each separately ground, and when inserted over the bolts the side plate, h, is placed in the recess or groove g, and the whole is secured by the bolts f fand the nuts c 2', forming a solid stock or gib, in

which the plates rest firmly on the solid center of the stock, held by the bolts and the side plate, It, in their proper position.

By this construction the cost of the hammer is reduced, and one side plate secures both sets of bits.

I am aware that the stock of a millstone-pick has been made in two parts, the dividing line intersecting the hole for the handle; but I make no claim to such construction. In my improvement that portion of the stock in which the hole for the handle is formed is made solid, and the fastening-plate is let into a groove in the main body of the stock, while the ends of the fastening-plate engage with the ends of the central portion of the stock, and thus thefastening-bolts are secured against any longitudinal or lateral displacement and the parts connected in'a firm and durable manner.

Havin gthus described myinvention I claim as new and desire to secure by Letters Patent- In a bush-hammer, the combination, with the stock or gib to, having the hole 1) formed therein, and provided with the sides 0 c and groove g, of the plate It, having a narrow central portion, 9, which fits in the groove g, and end pieces, 0 c, which abut against the shoulders c c, and bolts f f and bits dd, substantially as set forth.

JOHN B. SULLIVAN. Witnesses:

EUGENE B. PENDLETON, H. P. DODGE. 

